Drill press clamp



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DRILL. PRESS CLAMP Filed May 6, 1946 'INI/ENTOR.

Hto ra @Lg Patented Nov. 1, 1,949

UNITED STATES PATENT OFF'ECE- DRILL PRESS CLAMP Virgil W. Eshleman,Wichita, Kans.

Application May 6, 1946, Serial No. 667,574

1 Claim. 1

This invention relates to a safety device for application to drillpresses, whereby the jig and workpiece can be clamped rigidly on thedrill press without coming loose during the drilling operation.

A principal object of the present invention is to provide a clampingdevice designed for application to a drill press to hold a jig andworkpiece in position, wherein there is provided a single easilymanipulatable element for easily and rapidly securing the work and jigand/or releasing the same as may be desired.

One of the principal features of this safety vise is that it holds theworkpiece securely. Often on a drill press the jig will come loose andstart swinging, thus causing injury to the hands, face and body of theoperator before the switch can be reached to cut off the power.

The vise of the present invention is secured to the drill press and atall times is ready for the operator to use. It generally comprises aclamp or collar secured to the press post or column and carrying a pairof forwardly directed shanks between which is pivotally supported an endof a press arm- Associated with the press arm and Voscillatably carriedby and between the shanks is a cam element with means for turning thesame. The cam element when turned in one direction presses upwardlyagainst the inner end of the arm and moves the outer end down to clampthe work onto the drill table. Reverse oscillation of the cameffectsrelease of the arm so that the jig and work may be removed.

With these and other features in View, the invention will readily beunderstood from the following description with the aid of the attacheddrawing, which forms part of this application and in which:

Figure 1 is a perspective view, with some parts broken away, of the viseas secured on the drill press column; and

Figure 2 is a perspective View of a drill jig arm as shown.

One embodiment of this invention is illustrated in the drawing, whereinnumeral I represents the drill press column here shown as consisting ofan upright, round post which supports the drill press head structure.

The vise consists of a sleeve or band II which ts tightly around thecolumn I0 and is permanently secured thereon so that it cannot beremoved unless the drill press is dismantled.

Welded to this sleeve II- is a pair of forwardly directed, parallelShanks I2, I3 which are spaced 2 apart sufficiently to permit a jig armI4 to enter between them. Through transversely directed, mating holes I5in said Shanks I2, I3 and the jig arm I is inserted a pivot bolt or pinI6 which supports said jig arm between said vise Shanks I2, I3. The rearends of the Shanks I2 and I3 have transversely aligning bearings I1 oneonly of which is illustrated, intended for supporting a cam shaft I8.The shaft I8 has a cam member I9 removably secured thereon between theshanks and at one end on the outer side of the adjacent shank, aclamping lever 2U is secured. This lever is limited in its rearward orlocking swinging movement by a stud 2 I' on the sleeve II. In thislocked position the cam 9 abuts with its high point, or the surface onthe longest radius,

against the underside of the jig arm Ill, thereby oscillating the jigarm to force the outer end down into clamping position. By swinging thelever 2li in opposite direction, the cam pressure is released and thejig arm I4 can be reversely removed. The jig arm is shaped with an openguide 22 for the tool.

This jig arm I4 can now be exchanged for another arm Illa, having acylindrical aperture 22a for guiding a tool and transverse openings ISaand IIa for securing the same between the shank arms I2 and I3.

By removing the shaft I1 and the cam, a securing pin, not shown, can beinserted through the bearings I'I and the rear opening I'I'a, which, inassociation with the pivot pin I6, inserted through holes I5 and thebore Ita, will hold the arm Illa securely between the Shanks.

Different size adapters may be inserted in the opening 22a, in the outerend of the arm lila.

Any other jig arms similarly equipped may, of course, be employed forinterchange with jig arm I4.

It is to be understood that the invention as herein disclosed may bevaried from the details described and shown without departure from thespirit of the subjoined claim.

I claim:

A safety vise for use upon a drill press having an upright column and awork support, comprisl ing a member to be secured to the column, a

pair of forwardly directed spaced arms rigid with the member, arelatively long arm having one end portion disposed between the spacedarms, means for pivotally holding the elongated arm between the spacedarms, a shaft rotatably supported by the spaced arms inwardly of thepivotal mounting of the long arms, a cam carried by the shaft forengagement with the long arm' from below, an operating lever carried bythe shaft, and means UNITED STATES PATENTS for limiting the throw of thelever when the high Number Name Date point of the cam is uppermost.557,955 Boyer Apr. 7, 1896 i 5 905,095 Parker Nov. 24, 1908 VIRGIL W.ESHLEMAN. 935,010 French Sept. 28, 1909 2,077,106 Rashman Apr. 13, 1937REFERENCES CITED 2,269,727 Mead Jan. 13, 1942 2,409,706 Reppa Oct. 22,1946 mrghf ftgwgtgeferens are of record m the 10 2,403,900 Wetzlar Nov.18, 1947

